3-PHASE ACTIVE POWER-LINE CONDITIONER PLANNING

The active power line conditioner (APLC) is considered to be a very ef ficient type of active power filter that compensates the voltage wavef orm distortion caused by nonlinear loads in power systems. A new appro ach is based on a previously presented two-level algorithm, the three- phase optimal harmonic power flow (TOHPF), to investigate the determin ation of locations and sizes of three-phase (3 phi) APLCs. The objecti ve is to minimise the new APLC investment cost, the 3 phi, voltage dis tortion, and the system 3 phi MW losses while satisfying the 3 phi pow er flow equations, 3 phi harmonic power flow equations, 3 phi security constraints, and the harmonic standard. The master level of TOHPF det ermines the compensator/tap settings and the new APLC locations/sizes; the slave level of TOHPF includes subproblems which involve cases of fundamental and harmonic frequencies separately. Test results for an 1 8-bus distribution system show the applicability of the proposed metho d.